Display screen or portion thereof with a set of graphical user interfaces



The FIGURE is a front view of a display screen or portion thereof with a set of graphical user interfaces showing the claimed design.

The broken lines in the FIGURE show a display screen or portion thereof, and form no part of the claimed design.

The bracket shown in the FIGURE indicates a set. The set of graphical user interfaces is arranged relatively on the drawing sheet for the convenience of illustration, and the relative positioning forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a set of graphical user interfaces, as shown and described. 